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Category Archives: Event streaming

Event sourcing + free monads = free sourcing?

  • By Adam Warski
  • 28 October, 2015
  • 6 Comments

I recently wrote about Event Sourcing and Free Monads. The natural next step is combining the two! How would a free monad adjusted for event sourcing look like? Please bear … Continue Reading →


Clustering reactmq with akka-cluster

  • By Adam Warski
  • 4 November, 2014
  • 4 Comments

In the last two posts on reactmq, I described how to write a reactive, persistent message queue. The queue has the following characteristics: there is a single broker storing the … Continue Reading →


Making the Reactive Queue durable with Akka Persistence

  • By Adam Warski
  • 3 July, 2014
  • 7 Comments

Some time ago I wrote how to implement a reactive message queue with Akka Streams. The queue supports streaming send and receive operations with back-pressure, but has one downside: all … Continue Reading →


Event streaming with MongoDB

  • By Adam Warski
  • 27 November, 2012
  • 18 Comments

MongoDB is a really great “NoSQL” database, with a very wide range of applications. In one project that we are developing at SoftwareMill, we used it as a replicated event … Continue Reading →


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